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How to convert a List into a comma separated string without iterating List explicitly [dupli
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With Java 8:
String csv = String.join(",", ids);
With Java 7-, there is a dirty way (note: it works only if you don't insert strings which contain ", " in your list) - obviously, List#toString will perform a loop to create idList but it does n...
How to save MySQL query output to excel or .txt file? [duplicate]
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From Save MySQL query results into a text or CSV file:
MySQL provides an easy mechanism for writing the results of a select
statement into a text file on the server. Using extended options of
the INTO OUTFILE nomenclature, it is possible to create a comma
sepa...
How do I load a file from resource folder?
...ntextClassLoader();
InputStream is = classloader.getResourceAsStream("test.csv");
If the above doesn't work, various projects have been added the following class: ClassLoaderUtil1 (code here).2
Here are some examples of how that class is used:
src\main\java\com\company\test\YourCallingClass.ja...
R command for setting working directory to source file location in Rstudio
...s/proyect1").
Once you set that, you can navigate to a subdirectory: read.csv("DATA/mydata.csv"). Is the same as read.csv("D:/Documents/proyect1/DATA/mydata.csv").
If you want to navigate to a parent folder, you can use "../".
For example: read.csv("../olddata/DATA/mydata.csv") which is the same ...
UnicodeDecodeError: 'utf8' codec can't decode byte 0xa5 in position 0: invalid start byte
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This doesn't seem real clear. When importing a csv file how do you use this code?
– Dave
Sep 17 '19 at 15:13
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Having options in argparse with a dash
...help='Directory with .log and .log.gz files')
parser.add_argument('results-csv', type=argparse.FileType('w'),
default=sys.stdout,
help='Output .csv filename')
args = parser.parse_args()
print args
# gives
# Namespace(logs-dir='./', results-csv=<open file '...
UnicodeDecodeError, invalid continuation byte
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I had the same error when I tried to open a CSV file by pandas.read_csv
method.
The solution was change the encoding to latin-1:
pd.read_csv('ml-100k/u.item', sep='|', names=m_cols , encoding='latin-1')
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Keep only date part when using pandas.to_datetime
...es to datetime.date or datetime64[D] so that, when I write the data to CSV, the dates are not appended with 00:00:00 . I know I can convert the type manually element-by-element:
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What is the better API to Reading Excel sheets in java - JXL or Apache POI [closed]
...PIs is simpler to read/write/edit excel sheets ?
Do these APIs not support CSV extensions ?
4 Answers
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App Inventor 2 网络微数据库你用对了吗？ - App Inventor 2 中文网 - 清泛...
...的概念，即所有人使用同一个空间，这就导致如果A用户保存了一个键“test”，值为“123”，B用户接着又保存键“test”值为“456”，那么这时A用户如果获取键“test”，这时它的值就是456。也就是说所有人的数据键是公用的，没...